Oxidation of Platina(II)corrole to Platina(IV)corrole

Recently, the aromaticity and antiaromaticity of organometallacycles have received much attention to understand the cyclic electronic delocalization through d orbitals on the metal center. Here, we prepared a Pd(II) platina(II)corrole bipyridyl complex, which was converted to the corresponding stable Pt(IV) complex upon oxidation with iodobenzene dichloride. Oxidation of the platinum center did not result in the C–C bond formation between two pyrrole units via reductive elimination. The X-ray diffraction analysis of these complexes elucidated their nonplanar molecular structures. The nonaromatic nature of platina(II)- and platina(IV)corroles was revealed by ¹H NMR analysis and NICS calculations.